The ornamental design for the USB memory device, as shown and described.

Description

FIG. 1 is a left front perspective view of a first embodiment of the USB memory device of my new design, with the pivoting cover of the device shown in the partially open configuration, the right front perspective view being a mirror image thereof;

FIG. 2 is a front view thereof, with the pivoting cover of the device shown in the open configuration;

FIG. 3 is a rear view thereof, with the pivoting cover of the device shown in the open configuration;

FIG. 4 is a left perspective view thereof, with the pivoting cover of the device shown in the closed configuration, the right perspective view being a mirror image thereof;

FIG. 5 is a right front perspective view of a second embodiment of the USB memory device of my new design, with an optically transparent pivoting cover of the device shown in the closed configuration, the left front perspective view being a mirror image thereof;

FIG. 6 is a left rear perspective view thereof, with the pivoting cover of the device shown in the open configuration, the rear perspective view being a mirror image thereof; and,

FIG. 7 is a rear left perspective view thereof, with the pivoting cover of the device shown in the closed configuration the rear right perspective view being a mirror image thereof.